Can you debug servlets with jdb and attach?

D:\Java\orion>java -classic -Xdebug -Xrunjdwp:transport=dt_shmem,server=y,su
spen
d=n,address=jdbconn -Xnoagent -Djava.compiler=NONE -jar orion.jar
Orion/1.0 initialized

D:\>jdb -attach jdbconn
Internal exception:  java.lang.NullPointerException
        at
com.sun.tools.example.debug.tty.VMConnection.open(VMConnection.java:1
38)
        at com.sun.tools.example.debug.tty.Env.init(Env.java:68)
        at com.sun.tools.example.debug.tty.TTY.main(TTY.java:923)


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